I need help, I will pay for it if you want.

I need your help on something about the connection of PAYPAL¡¯ IPN and SHOPPING CART

I use Pay Pal Website Payments Pro of Accept credit cards on your website using Pay Pal, and I have finished the first three steps of Pay Pal.
I don¡¯t know how to deal with () in the last step,
My website is ASP program, the website has it¡¯s shopping ca

My website is ASP program, the website has it¡¯s shopping cart , now we want the client to pay using credit card through PAYPAL.
please contact me: msn: postweb123@hotmail.com (china)